Wow you have no clue what you're talking about.
And don't give us another driver support argument you lost that in another thread.
Here's the test of techreport, this site i like because of it's methodology. Average fps is not the only thing. techreport
A single current high-end card is always prefered compared to a 6990.
And about the noise, heat thing, it's subjective but it means a lot to me. (tested)